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Proofread -Xjvm-default description

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Alexander Udalov
2021-11-20 19:47:51 +01:00
parent 874b442a13
commit 40162dbf89
2 changed files with 44 additions and 50 deletions
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compiler/testData/cli/jvm/extraHelp.out
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+22 -25
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@@ -48,34 +48,31 @@ where advanced options include:
* strict (experimental; treat as other supported nullability annotations)
* warn (report a warning)
-Xjvm-default={all|all-compatibility|disable|enable|compatibility}
Emit JVM default methods for interface declarations with bodies.
-Xjvm-default=all Generate JVM default methods for all interface declarations with bodies in module.
Do not generate DefaultImpls stubs for such declarations (that is default behaviour of compiler in 'disable' mode).
If interface inherits such methods from interface compiled in 'disable' scheme
then implicit DefaultImpls stubs would be generated as there are no default method for it.
BREAKS BINARY COMPATIBILITY if some client code relies on the presence of
DefaultImpls classes. Also prohibits the produced binaries to be read by Kotlin
compilers earlier than 1.4.
Emit JVM default methods for interface declarations with bodies. Default is 'disable'.
-Xjvm-default=all Generate JVM default methods for all interface declarations with bodies in the module.
Do not generate DefaultImpls stubs for interface declarations with bodies, which are generated by default
in the 'disable' mode. If interface inherits a method with body from an interface compiled in the 'disable'
mode and doesn't override it, then a DefaultImpls stub will be generated for it.
BREAKS BINARY COMPATIBILITY if some client code relies on the presence of DefaultImpls classes.
Note that if interface delegation is used, all interface methods are delegated.
The only exception are methods annotated with the deprecated @JvmDefault annotation.
-Xjvm-default=all-compatibility In addition to `all` mode generate compatibility stubs in the DefaultImpls classes.
Compatibility stubs could be useful for library and runtime authors
to keep backward binary compatibility for existing client compiled against previous library versions.
New 'all' and 'all-compatibility' modes are changing library ABI surface that will be used by client after their recompilation.
In that sense client might be incompatible with previous library versions that REQUIRE PROPER LIBRARY VERSIONING.
In case of inheritance from a Kotlin interface compiled in the old scheme
(DefaultImpls, no default methods), the implicit stubs in DefaultImpls
will delegate to the DefaultImpls method of the superinterface.
Otherwise the compatibility stubs in DefaultImpls would invoke the default method on the interface via special accessor in it,
with standard JVM runtime resolution semantics.
Perform additional compatibility checks for classes in case of implicit specialized override
presence in 'disable' scheme (See KT-39603 for more details)
-Xjvm-default=disable Default behaviour. Do not generate JVM default methods and prohibit @JvmDefault annotation usage.
-Xjvm-default=enable Deprecated. Allow usages of @JvmDefault; only generate the default method
for annotated method in the interface
(annotating an existing method can break binary compatibility)
-Xjvm-default=all-compatibility In addition to the 'all' mode, generate compatibility stubs in the DefaultImpls classes.
Compatibility stubs could be useful for library and runtime authors to keep backward binary compatibility
for existing clients compiled against previous library versions.
'all' and 'all-compatibility' modes are changing the library ABI surface that will be used by clients after
the recompilation of the library. In that sense, clients might be incompatible with previous library
versions. This usually means that proper library versioning is required, e.g. major version increase in SemVer.
In case of inheritance from a Kotlin interface compiled in 'all' or 'all-compatibility' modes, DefaultImpls
compatibility stubs will invoke the default method of the interface with standard JVM runtime resolution semantics.
Perform additional compatibility checks for classes inheriting generic interfaces where in some cases
additional implicit method with specialized signatures was generated in the 'disable' mode:
unlike in the 'disable' mode, the compiler will report an error if such method is not overridden explicitly
and the class is not annotated with @JvmDefaultWithoutCompatibility (see KT-39603 for more details).
-Xjvm-default=disable Default behavior. Do not generate JVM default methods and prohibit @JvmDefault annotation usage.
-Xjvm-default=enable Deprecated. Allow usages of @JvmDefault; only generate the default method for annotated method
in the interface (annotating an existing method can break binary compatibility).
-Xjvm-default=compatibility Deprecated. Allow usages of @JvmDefault; generate a compatibility accessor
in the 'DefaultImpls' class in addition to the default interface method
in the DefaultImpls class in addition to the default interface method.
-Xjvm-default-allow-non-default-inheritance
Allow inheritance from 'all*' modes for 'disable' one
-Xklib=<path> Paths to cross-platform libraries in .klib format